Steady-rest for lathes.



Specification of Letters Patent.

Application filed m a1, 1912. Serial 179 712,588.

Patented Apr. 15,1913.

To all whom it may concern: I

Be it known that I, Esrr D. SHERRILL, a citizen of the United States,resident of Hickory, in the county of Catawba and State of North.Carolina, have made a certain new and useful Invention i111 Steady-Rests for Lathes; and I declare the following to be a full, clear, andexact description of the same, such as will enable others skilled in theart to which it a'pper tains tomake and use the invention, referencebeing had to the accompanying drawings, and to letters or figures ofreference marked thereon, which form apart of this specification.

Figure 1 is a side view ofthe invention. Fig. 2 is a setion on the line2-2, Fig. 1.

The invention relates to improvements in steady rests or followers forlathes, and it consists in the novel construction and combinations ofparts, as hereinafter set forth.

In the accompanying drawings, illustrating the invention, the numeral 2indicates a tool post to which the circular body 3 of the steady rest issecured, the post having a concave bearin 4 at its upper end and athreaded projectlon 5 therefrom, said rojection being designed to engagea per oration in the bottom of the circular body or 'ring 3, which isdesigned to be seated in the bearinget and to be firmly secured in placeby a nut engaging the threaded end of the projection. This body'may bemade in two semicircular parts, secured together so that it can beopened. The front and rear faces of this body are parallel, andhaveseries of equidistant radial channels or recess seats 6, which areusually three in number in each face. Theradial channel seats of thefront are opposite to those of the back, and between each two oppositechannels the body of the ring continues in the form of an intermediatebearing 7 through which is made a perforation 8. Each channel seat ismade deep enough to receive an arm of an adjustable bifurcated bar,which engages the intermediate bearing 7. For ordinary pur-,

poses the body may be made about an inch thick from front to rear andeach channel seat one-third of an inch deep.

The adjustable bifurcated ibar,.' indicated at 9, is preferably made ofsteel and is rectangular in cross-section. It is designed to beef aboutthe same thickness as the circular. body. Its bifurcations or arms 10extend from the solid outer portion or head 12 and are of flattenedrectangular form, to

fit in the channel seats 6 in such wise that the intermediate thinnerportiofior'bearing I 7 of the ring is between them. The arms 10 areprovided with longitudinal slots 13, through which passes a short bolt14, which also passes through the perforation 8 of the:

threaded perforation in the head 15 o the a short bolt 14:. By means ofthe screw 18 very small or minute adjustments of the bar 9 in the radialdirection may be made. This screw also prevents the short bolt fromturning. Theends of the arms 10 of the bar 9 are provided with seats forthe ends of the journal or bearing of the end roller 19,

which forms with the end rollers of the other bars 9 the steady restbearings for the work. The rollers should have a little play on theirbearings for efiiciency in smoothing the work. In adjusting theserollers the short bolts 14 which clamp the bars 9 to the channelbearings of the ring are loosened and the adjusting screws turned, tocause the bars to move radially inward until the rollers bear .on thework. Then the nuts 16 of the short bolts are turned up to secure thebar in gosition, until anotheradjustment is require a This steady restis designed to take up but little room in the lathe, longitudinally,because of' the parallelism of the faces of the circular body and theseating of the. bars 9 in channels in these faces in such wise that theouter surfaces of the bars are substantially .flush with the faces ofthe bodyor ring, and do not add to the longitudinal space required.Although the rest .is designed to be arranged in the lathe so as tofollow just behind the tool while cutting, it

does not interfere with the operator or obstruct the view of the work,the pressure of which, through the bearing rollers, is transmitted. tothe circular body inan equalized or balanced manner, so that there is noobliquity of strain.

Having described the invention, what I 2."In a steady rest or follower,a circular body having'opposite radial recess seats,

reeess seats, rollers carried by said, bars,- clampmg bolts engagingsaid bars and said 15 seats,- and ad ust1ng screws engaging the clampingbolts and connected to the bars.

y In testunony whereof I afiix my signature, in presence of twowitnesses.

I ESPY 1).: SHER I LL.

' Witnesses: i i

. D. D, ROWE,

' 3 0 A. MOSER.

Sbmd radial atea bars engag g sail.

